When it comes to writing SQL queries, every organization has its own conventions and practices. Some have documented guidelines, while others rely on unwritten rules and heuristics. However, following design patterns and best practices is crucial for writing readable and maintainable SQL queries.
In the book “SQL Query Design Patterns and Best Practices: A practical guide to writing readable and maintainable SQL queries using its design patterns,” the author provides a comprehensive overview of various SQL query design patterns and best practices. While the book may have some inconsistencies, it offers valuable insights into refining queries, solving complex business problems, optimizing performance, and working with data on the modern data platform.
The book is divided into four parts:
- Refining Your Queries to Get the Results You Need
- Solving Complex Business and Data Problems in Your Queries
- Optimizing Your Queries to Improve Performance
- Working with Your Data on the Modern Data Platform
These parts cover a wide range of topics, including data retrieval, troubleshooting, query performance, and data platform. While the book may not delve deeply into each topic due to its limited page count, it serves as a good starting point for those new to the industry.
One of the highlights of the book is its emphasis on reducing rows and columns in result sets. Even the best-written code can perform poorly if it has to process a large volume of data. The book reminds readers that it’s important to consider system resources and avoid unnecessary data in the presentation layer.
Who is this book for? If you’re new to the database industry and SQL Server is your primary tool, this book is a valuable resource for refreshing your T-SQL skills. However, if you’re an experienced data professional who has already established database conventions, you may find this book less useful.
For those starting out, this book can be a great companion to other T-SQL primers such as Itzik Ben-Gan’s “T-SQL Fundamentals” or Pedro Lopes and Pam Lahoud’s “Learn T-SQL Querying: A guide to developing efficient and elegant T-SQL code.” These resources, along with “SQL Query Design Patterns and Best Practices,” can help you build a strong foundation in T-SQL.
Remember, following design patterns and best practices is essential for writing maintainable and efficient SQL queries. By incorporating these principles into your daily operations, you can ensure the longevity and effectiveness of your database discipline.
Happy querying!